mirror of https://github.com/aseprite/aseprite.git
173 lines
7.8 KiB
C++
173 lines
7.8 KiB
C++
// Aseprite UI Library
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// Copyright (C) 2018-2025 Igara Studio S.A.
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// Copyright (C) 2001-2017 David Capello
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//
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// This file is released under the terms of the MIT license.
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// Read LICENSE.txt for more information.
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gfx/size.h"
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#include "ui/box.h"
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#include "ui/message.h"
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#include "ui/resize_event.h"
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#include "ui/scale.h"
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#include "ui/size_hint_event.h"
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#include "ui/theme.h"
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#include <algorithm>
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namespace ui {
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using namespace gfx;
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Box::Box(int align) : Widget(kBoxWidget)
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{
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enableFlags(IGNORE_MOUSE);
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setAlign(align);
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initTheme();
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}
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void Box::onSizeHint(SizeHintEvent& ev)
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{
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#define ADD_CHILD_SIZE(w, h) \
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{ \
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if (align() & HOMOGENEOUS) \
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prefSize.w = std::max(prefSize.w, childSize.w); \
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else \
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prefSize.w += childSize.w; \
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prefSize.h = std::max(prefSize.h, childSize.h); \
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fitIn.w = std::max(0, fitIn.w - prefSize.w); \
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}
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#define FINAL_ADJUSTMENT(w) \
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{ \
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if (align() & HOMOGENEOUS) \
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prefSize.w *= visibleChildren; \
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prefSize.w += childSpacing() * (visibleChildren - 1); \
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}
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int visibleChildren = 0;
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for (auto* child : children()) {
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if (!child->hasFlags(HIDDEN))
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++visibleChildren;
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}
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Size prefSize(0, 0);
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Size fitIn(0, 0);
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if (align() & HORIZONTAL)
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fitIn.w = ev.fitInWidth();
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else
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fitIn.h = ev.fitInHeight();
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for (auto child : children()) {
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if (child->hasFlags(HIDDEN))
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continue;
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Size childSize = child->sizeHint(fitIn);
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if (align() & HORIZONTAL) {
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ADD_CHILD_SIZE(w, h);
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}
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else {
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ADD_CHILD_SIZE(h, w);
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}
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}
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if (visibleChildren > 0) {
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if (align() & HORIZONTAL) {
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FINAL_ADJUSTMENT(w);
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}
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else {
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FINAL_ADJUSTMENT(h);
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}
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}
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prefSize.w += border().width();
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prefSize.h += border().height();
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ev.setSizeHint(prefSize);
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}
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void Box::onResize(ResizeEvent& ev)
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{
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#define LAYOUT_CHILDREN(x, y, w, h) \
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{ \
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availExtraSize = availSize.w - prefSize.w; \
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availSize.w -= childSpacing() * (visibleChildren - 1); \
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if (align() & HOMOGENEOUS) \
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homogeneousSize = availSize.w / visibleChildren; \
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\
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Rect defChildPos(childrenBounds()); \
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int i = 0, j = 0; \
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for (auto child : children()) { \
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if (child->hasFlags(HIDDEN)) \
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continue; \
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\
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int size = 0; \
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\
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if (align() & HOMOGENEOUS) { \
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if (i < visibleChildren - 1) \
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size = homogeneousSize; \
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else \
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size = availSize.w; \
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} \
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else { \
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size = child->sizeHint(availSize).w; \
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\
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if (child->isExpansive()) { \
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const int extraSize = guiscaled_div(availExtraSize, (expansiveChildren - j)); \
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size += extraSize; \
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availExtraSize -= extraSize; \
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if (++j == expansiveChildren) \
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size += availExtraSize; \
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} \
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else { \
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availExtraSize -= (size - child->sizeHint().w); \
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} \
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} \
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\
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Rect childPos = defChildPos; \
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childPos.w = size = std::clamp(size, child->minSize().w, child->maxSize().w); \
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childPos.h = std::clamp(childPos.h, child->minSize().h, child->maxSize().h); \
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child->setBounds(childPos); \
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\
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defChildPos.x += size + childSpacing(); \
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availSize.w -= size; \
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++i; \
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} \
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}
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setBoundsQuietly(ev.bounds());
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int visibleChildren = 0;
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int expansiveChildren = 0;
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for (auto child : children()) {
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if (!child->hasFlags(HIDDEN)) {
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++visibleChildren;
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if (child->isExpansive())
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++expansiveChildren;
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}
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}
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if (visibleChildren > 0) {
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Size availSize = childrenBounds().size();
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Size prefSize = sizeHint(availSize);
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int homogeneousSize = 0;
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int availExtraSize = 0;
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prefSize.w -= border().width();
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prefSize.h -= border().height();
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if (align() & HORIZONTAL) {
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LAYOUT_CHILDREN(x, y, w, h);
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}
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else {
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LAYOUT_CHILDREN(y, x, h, w);
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}
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}
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}
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} // namespace ui
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